CN108449561B - Time code converter - Google Patents
Time code converter Download PDFInfo
- Publication number
- CN108449561B CN108449561B CN201810517734.5A CN201810517734A CN108449561B CN 108449561 B CN108449561 B CN 108449561B CN 201810517734 A CN201810517734 A CN 201810517734A CN 108449561 B CN108449561 B CN 108449561B
- Authority
- CN
- China
- Prior art keywords
- signal
- midi
- ltc
- time code
- data processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/0033—Recording/reproducing or transmission of music for electrophonic musical instruments
- G10H1/0041—Recording/reproducing or transmission of music for electrophonic musical instruments in coded form
- G10H1/0058—Transmission between separate instruments or between individual components of a musical system
- G10H1/0066—Transmission between separate instruments or between individual components of a musical system using a MIDI interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
Abstract
The invention relates to the technical field of time code processing, in particular a time-to-code converter, the key point of the technical scheme is that the system comprises a data processing module, a signal receiving module and a signal output module; the signal receiving module is used for receiving and sending the multimedia signal to the data processing module; the data processing module processes the multimedia signal and sends corresponding MIDI time code signals and LTC time code signals to the signal output module; the signal receiving module receives the multimedia signal output by the front-end equipment, transmits the multimedia signal to the data processing module for conversion, and transmits the corresponding MIDI time code signal and LTC time code signal to the used equipment, so that the signal receiving module is suitable for the use requirements of synchronous time code signals of different types of equipment, and is convenient and practical.
Description
Technical Field
The present invention relates to the field of time code processing, and more particularly, to a time code converter.
Background
The fields of light control, sound control, electronic musical instruments, cameras and the like have the use demands for MIDI and LTC synchronous time code signals, but the prior art can only realize the use after the conversion of independent MIDI or independent LTC signals, so that the actual use is extremely inconvenient.
Disclosure of Invention
The invention aims to provide a time code converter which converts an input multimedia signal into a MIDI time code signal and an LTC time code signal for output, and is convenient and practical.
The technical aim of the invention is realized by the following technical scheme: the time code converter comprises a data processing module, a signal receiving module and a signal output module; the signal receiving module is used for receiving and sending the multimedia signal to the data processing module; the data processing module processes the multimedia signal and transmits corresponding MIDI time code signals and LTC time code signals to the signal output module.
Through adopting above-mentioned technical scheme, the multimedia signal of front-end equipment output is received to signal receiving module to transmit and convert in the data processing module, and carry to the equipment of receiving with corresponding MIDI time code signal and LTC time code signal, adapt to the user demand of the synchronous time code signal of different grade type equipment, convenient and practical.
Preferably, the signal receiving module comprises a USB interface, an SD/HD signal input interface, a MIDI signal input interface and an LTC signal input interface; the signal output module comprises a MIDI signal output interface and an LTC signal output interface.
By adopting the technical scheme, the device can receive music signals from a computer through a USB interface, receive SD/HD signals from video cameras and the like through an SD/HD signal input interface, receive MIDI signals from electronic musical instruments, lamplight sounds and the like through a MIDI signal input interface and receive LTC signals from the electronic musical instruments, lamplight sounds and the like through an LTC signal input interface, input the signals to a data processing module for conversion, and output the signals through a MIDI signal output interface and an LTC signal output interface respectively in the form of MIDI time code signals and LTC time code signals through a signal output module, so that the device is suitable for the requirements of various front-stage devices.
Preferably, signal amplifiers are respectively connected between the SD/HD signal input interface, the MIDI signal input interface and the LTC signal input interface and the data processing module.
By adopting the technical scheme, the received signals are amplified, and the precision is improved.
Preferably, the data processing module is connected with a work display module for displaying the work frequency.
By adopting the technical scheme, a user can know the real-time working frequency of the equipment conveniently and practically.
Preferably, the working display module comprises an LED digital display driving unit connected with the data processing module and an LED digital display screen driven by the LED digital display driving unit.
By adopting the technical scheme, the real-time working frequency of the equipment is displayed on the LED digital display screen, so that the equipment is convenient and visual.
Preferably, the data processing module is connected with a working mode switching key, the working mode switching key comprises a first working mode selecting key and a second working mode selecting key, the first working mode selecting key is used for selecting a signal input source, and the second working mode selecting key is used for selecting a frequency range of an input signal.
By adopting the technical scheme, the input source of the signal and the frequency range of the input signal are selected, so that the equipment can conveniently recognize the input signal.
Preferably, the data processing module is connected with a working mode indicating unit.
By adopting the technical scheme, the type of the current input signal is indicated, and the working condition of the equipment is conveniently known.
Preferably, the operation mode indicating unit includes an operation mode selection indicating lamp driving unit connected to the data processing module and an operation mode selection status indicating lamp driven by the operation mode selection indicating lamp driving unit.
By adopting the technical scheme, the type of the current input signal is indicated in the form of the indicator lamp, so that the working condition of the equipment is more intuitively known.
Preferably, the SD/HD signal input interface is connected with the data processing module through the video synchronous separator.
By adopting the technical scheme, the video synchronous separator separates the vertical synchronous signal and the horizontal synchronous signal of the composite video signal in the SD/HD signal, so that the data processing module can conveniently process the composite video signal.
Preferably, the data processing module is connected with the MIDI signal input interface through the signal isolator.
By adopting the technical scheme, the signal isolator protects the equipment and prolongs the service life of the equipment.
In summary, the invention has the following beneficial effects:
1. the multimedia signals output by the front-end equipment are converted and are transmitted to the receiving equipment by corresponding MIDI time code signals and LTC time code signals, so that the use requirements of synchronous time code signals of different types of equipment are met;
2. the work display module is convenient for a user to know the real-time work frequency of the equipment;
3. the working mode indicating unit indicates the type of the current input signal, so that the working condition of the equipment can be conveniently known.
Drawings
FIG. 1 is a functional block diagram of a time transcoder;
FIG. 2 is a schematic diagram of the connection of data processing modules in a time transcoder;
FIG. 3 is a schematic circuit diagram of SD/HD signal input interface, LTC signal input interface and MIDI signal output interface in a time code converter;
FIG. 4 is a schematic circuit diagram of the MIDI signal input interface, USB interface and LTC signal output interface of the time code converter;
FIG. 5is a schematic circuit diagram of the operation mode indication unit in the time code converter;
fig. 6 is a schematic circuit diagram of the operation display module in the time code converter.
In the figure: 1. a USB interface; 2. an SD/HD signal input interface; 3. a MIDI signal input interface; 4. an LTC signal input interface; 5. a single chip microcomputer; 6. an LED digital display driving unit; 7. an LED digital display screen; 8. a first selection key of the working mode; 9. a second working mode selecting key; 10. the working mode is that an LED indication driving unit is selected; 11. selecting an LED indication driving unit in a second working mode; 12. a working mode I selects a state LED indicator lamp; 13. a working mode II selects a state LED indicator lamp; 14. a video synchronization separator; 15. a MIDI signal output interface; 16. LTC signal output interface.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The following specific examples are intended to be illustrative of the invention and are not intended to be limiting, as modifications of the embodiments will be apparent to those skilled in the art upon reading the present specification without inventive contribution, but are intended to be within the scope of the following claims.
The time code converter, as shown in fig. 1, comprises a data processing module, wherein the data processing module is connected with a USB interface 1, the USB interface 1 supplies power for the time code converter and transmits music signals from a computer to the data processing module, and the data processing module is connected with an SD/HD signal input interface 2, a MIDI signal input interface 3, an LTC signal input interface 4, a MIDI signal output interface 15 and an LTC signal output interface 16. Signal amplifiers are connected among the SD/HD signal input interface 2, the MIDI signal input interface 3, the LTC signal input interface 4, the LTC signal output interface 16 and the data processing module, and signal isolators are connected between the MIDI signal output interface 15 and the data processing module. The data processing module receives the music signal, SD/HD signal the MIDI signals and LTC signals are converted into MIDI time code signals and LTC time code signals and output via the MIDI signal output interface 15 and LTC signal output interface 16, respectively.
The data processing module is connected with a working mode switching key, the working mode switching key comprises a working mode one-choice key 8 and a working mode two-choice key 9, the working mode one-choice key 8 is used for choosing a signal input source, and the working mode two-choice key 9 is used for choosing a frequency range of an input signal.
The data processing module is connected with a working mode indicating unit for indicating the current working mode of the time code converter, the working mode indicating unit comprises a working mode selection indicating lamp driving unit and a working mode selection state indicating lamp, the working mode selection indicating lamp driving unit is connected with the data processing module, the working mode selection indicating lamp driving unit is driven by the working mode selection indicating lamp driving unit, the working mode selection indicating lamp driving unit comprises a working mode one-selection LED indicating driving unit 10 and a working mode two-selection LED indicating driving unit 11, and the working mode selection state indicating lamp comprises a working mode one-selection state LED indicating lamp 12 and a working mode two-selection state LED indicating lamp 13.
The data processing module is connected with a work display module for displaying the work frequency, and the work display module comprises an LED digital display driving unit 6 connected with the data processing module and an LED digital display screen 7 driven by the LED digital display driving unit 6.
As shown in fig. 2 and 3, in the present embodiment, the data processing module adopts a single-chip microcomputer 5 with a model number of C8051F346, and the single-chip microcomputer 5is connected with an off-chip data memory 24AA01.
The SD/HD signal input interface 2 is connected with a video synchronization separator 14 with the model of ISL59885ISZ, the SD/HD signal input interface 2 is connected with a composite video input end of the video synchronization separator 14, the video synchronization separator 14 is connected with a four-side exclusive-OR gate with the model of 74AC86, a 5 pin of the four-side exclusive-OR gate is connected with a vertical synchronization output end of the video synchronization separator 14, a 4 pin of the four-side exclusive-OR gate is grounded, a 6 pin of the four-side exclusive-OR gate is connected with P1-4 ends of the singlechip 5, a 9 pin of the four-side exclusive-OR gate is connected with a horizontal synchronization output end of the video synchronization separator 14, a 10 pin of the four-side exclusive-OR gate is grounded, an 8 pin of the four-side exclusive-OR gate is connected with P0-7 ends of the singlechip 5, the video synchronization separator 14 amplifies a vertical synchronization signal and a horizontal synchronization signal separated from the composite video signal and transmits the vertical synchronization signal and the horizontal synchronization signal to the singlechip 5 for processing, and the singlechip 5 converts the vertical synchronization signal and the horizontal synchronization signal into a corresponding MIDI synchronization time code signal and LTC synchronization time code signal.
The LTC signal input interface 4 is amplified by an operational amplifier with the model LM358 and then connected to the 2 pins of the four-side exclusive-OR gate, the 1 pins of the four-side exclusive-OR gate are grounded, the 3 pins of the four-side exclusive-OR gate are connected with the P1-2 end of the singlechip 5, and the amplified LTC signal is transmitted to the singlechip 5 for processing.
The P0-4 end of the singlechip 5is connected with the 12 pins of the four-side exclusive-OR gate, the 13 pins of the four-side exclusive-OR gate are grounded, the 11 pins of the four-side exclusive-OR gate are connected with the MIDI signal output interface 15, and MIDI synchronous time code signals output by the P0-4 end of the singlechip 5 are transmitted to the MIDI signal output interface 15 through the four-side exclusive-OR gate to provide MIDI synchronous time code signals for the used equipment.
As shown in fig. 2 and 4, the MIDI signal input interface 3 is connected to the P0-5 end of the single chip microcomputer 5 through a photoelectric coupler, i.e. a signal isolator, of the model number 6N137, which protects the equipment and amplifies MIDI signals.
USB interface 1 provides 5V power to the device and 3.3V power to the device via a voltage regulator model LM 1086-3.3.
The data ports D+ and D-of the USB interface 1 are connected to the D+ end and the D-end of the single chip microcomputer 5 through an electrostatic protector with the model number NUF2030XV6T1G, the electrostatic protector performs electrostatic protection on equipment, and the single chip microcomputer 5 receives a music signal from the USB interface 1 and converts the music signal into a corresponding MIDI synchronous time code signal and LTC synchronous time code signal.
The P1-3 end of the singlechip 5 outputs an LTC synchronous time code signal, and the LTC synchronous time code signal is amplified by an operational amplifier with model LM358 and then connected to the LTC signal output interface 16 to provide the LTC synchronous time code signal for the used equipment.
As shown in fig. 2 and 5, the P2-0 end and the P2-1 end of the singlechip 5 are grounded via the tact switches J1 and J2, respectively, wherein the tact switch J1 is a selection key 8 for the working mode, the tact switch J2 is a second selection key 9 of the working mode, the tact switch J1 is used for selecting a signal input source, and the tact switch J2 is used for selecting a frequency range of an input signal.
The first selection LED indication driving unit 10 and the second selection LED indication driving unit 11 are displacement buffers with the model number of 74HC595D, the first selection LED indication lamp 12 and the second selection LED indication lamp 13 are respectively driven, the 9 pin of the first selection LED indication driving unit 10 is connected with the 14 pin of the second selection LED indication driving unit 11, the 11-13 pins of the two displacement buffers are respectively connected with the P2-2, P2-4 and P2-5 ends of the singlechip 5, and the 14 pin of the first selection LED indication driving unit 10 is connected with the P2-3 end of the singlechip 5.
With reference to fig. 2 and 6, the LED digital display driving unit 6 is an LED driving chip with a model number MAX7221CWG, and the LED digital display screen 7 is composed of 4 nixie tubes with a model number KYX-5261AS/BS and is driven by the LED driving chip.
The specific using process comprises the following steps: the USB interface 1 is connected to a computer or a 5V300mA adapter is used for providing power, a signal input source is selected by using a first operation mode selection key 8, and a second operation mode selection key 9 selects the frequency range of the input signal.
When the LTC signal is selected to be input, equipment for outputting the LTC signal such as an electronic musical instrument, lamplight sound equipment and the like is connected to the LTC signal input interface 4, the LTC signal is amplified and then transmitted to the singlechip 5 to be converted into a corresponding LTC synchronous time code signal and a MIDI synchronous time code signal, and the corresponding LTC signal output interface 16 and the MIDI signal output interface 15 output the corresponding LTC synchronous time code signal and the MIDI synchronous time code signal to the used equipment.
When the MIDI signal is selected for input, the equipment for outputting the MIDI signal such as the electronic musical instrument, the lamplight sound equipment and the like is connected to the MIDI signal input interface 3, the MIDI signal is amplified and then transmitted to the singlechip 5 to be converted into the corresponding LTC synchronous time code signal and the MIDI synchronous time code signal, and the corresponding LTC signal output interface 16 and the MIDI signal output interface 15 are used for output to the equipment.
When the SD/HD signal is selected to be input, the equipment such as a video camera for outputting the SD/HD signal is connected to the SD/HD signal input interface 2, the SD/HD signal is amplified and then transmitted to the singlechip 5 to be converted into corresponding LTC synchronous time code signals and MIDI synchronous time code signals, and the corresponding LTC synchronous time code signals and MIDI synchronous time code signals are output to the used equipment from the corresponding LTC signal output interface 16 and MIDI signal output interface 15.
When the music signal input of the USB interface 1 is selected, the single chip microcomputer 5 receives the music signal from the computer and converts it into a corresponding MIDI synchronous time code signal and LTC synchronous time code signal, and outputs it from the corresponding LTC signal output interface 16 and MIDI signal output interface 15 to the used apparatus.
The LED digital display 7 displays the current operating frequency while outputting the MIDI synchronous time code signal and the LTC synchronous time code signal.
Claims (9)
1. A time code converter characterized by:
the system comprises a data processing module, a signal receiving module and a signal output module;
the signal receiving module is used for receiving and sending the multimedia signal to the data processing module;
the data processing module processes the multimedia signal and sends corresponding MIDI time code signals and LTC time code signals to the signal output module;
the signal receiving module comprises a USB interface (1), an SD/HD signal input interface (2), a MIDI signal input interface (3) and an LTC signal input interface (4);
the signal output module comprises a MIDI signal output interface (15) and an LTC signal output interface (16);
the signal receiving module receives music signals from a computer through the USB interface (1), receives SD/HD signals from a video camera through the SD/HD signal input interface (2), receives MIDI signals from an electronic musical instrument and lamplight sound output through the MIDI signal input interface (3) and receives LTC signals from the electronic musical instrument and lamplight sound output through the LTC signal input interface (4);
when an LTC signal is input, equipment for outputting the LTC signal by an electronic musical instrument and lamplight sound is connected to the LTC signal input interface (4), the LTC signal is amplified and then transmitted to the singlechip (5) to be converted into a corresponding LTC synchronous time code signal and a MIDI synchronous time code signal, and the corresponding LTC signal output interface (16) and the MIDI signal output interface (15) are used for outputting the corresponding LTC signal and the MIDI synchronous time code signal to a receiving equipment;
when a MIDI signal is input, equipment for outputting the MIDI signal by an electronic musical instrument and lamplight sound is connected to the MIDI signal input interface (3), the MIDI signal is amplified and then transmitted to the singlechip (5) to be converted into a corresponding LTC synchronous time code signal and a MIDI synchronous time code signal, and the corresponding LTC synchronous time code signal and the MIDI synchronous time code signal are output to a receiving equipment from the corresponding LTC signal output interface (16) and the MIDI signal output interface (15);
when an SD/HD signal is input, equipment such as a video camera which outputs the SD/HD signal is connected to the SD/HD signal input interface (2), the SD/HD signal is amplified and then transmitted to the singlechip (5) to be converted into a corresponding LTC synchronous time code signal and a MIDI synchronous time code signal, and the corresponding LTC synchronous time code signal and MIDI synchronous time code signal are output to a used equipment from the corresponding LTC signal output interface (16) and the MIDI signal output interface (15);
when the music signal of the USB interface (1) is input, the singlechip (5) receives the music signal from the computer, converts the music signal into a corresponding MIDI synchronous time code signal and a corresponding LTC synchronous time code signal, and outputs the corresponding LTC signal output interface (16) and the corresponding MIDI signal output interface (15) to the used equipment.
2. The time-to-code converter of claim 1, wherein: and signal amplifiers are respectively connected between the SD/HD signal input interface (2), the MIDI signal input interface (3) and the LTC signal input interface (4) and the data processing module.
3. The time-to-code converter of claim 1, wherein: the data processing module is connected with a work display module for displaying the work frequency.
4. A time transcoder according to claim 3, characterized in that: the work display module comprises an LED digital display driving unit (6) connected with the data processing module and an LED digital display screen (7) driven by the LED digital display driving unit (6).
5. The time-to-code converter of claim 1, wherein: the data processing module is connected with a working mode switching key, the working mode switching key comprises a working mode one-choice key (8) and a working mode two-choice key (9), the working mode one-choice key (8) is used for choosing a signal input source, and the working mode two-choice key (9) is used for choosing a frequency range of an input signal.
6. The time-to-code converter of claim 5, wherein: the data processing module is connected with a working mode indicating unit.
7. The time-to-code converter of claim 6, wherein: the working mode indicating unit comprises a working mode selection indicating lamp driving unit connected with the data processing module and a working mode selection state indicating lamp driven by the working mode selection indicating lamp driving unit.
8. The time-to-code converter of claim 1, wherein: the SD/HD signal input interface (2) is connected with the data processing module through the video synchronous separator (14).
9. The time-to-code converter of claim 1, wherein: the data processing module is connected with the MIDI signal input interface (3) through the signal isolator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517734.5A CN108449561B (en) | 2018-05-25 | 2018-05-25 | Time code converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517734.5A CN108449561B (en) | 2018-05-25 | 2018-05-25 | Time code converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108449561A CN108449561A (en) | 2018-08-24 |
| CN108449561B true CN108449561B (en) | 2023-10-10 |
Family
ID=63205674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810517734.5A Active CN108449561B (en) | 2018-05-25 | 2018-05-25 | Time code converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108449561B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764965A (en) * | 1996-09-23 | 1998-06-09 | Silicon Graphics, Inc. | Synchronization infrastructure for use in a computer system |
| US5828678A (en) * | 1996-04-12 | 1998-10-27 | Avid Technologies, Inc. | Digital audio resolving apparatus and method |
| US5857044A (en) * | 1996-09-23 | 1999-01-05 | Sony Corporation | Method and apparatus for processing time code |
| US6134379A (en) * | 1997-03-20 | 2000-10-17 | Avid Technology, Inc. | Method and apparatus for synchronizing devices in an audio/video system |
| KR20080087267A (en) * | 2007-03-26 | 2008-10-01 | 주식회사 시큐인포 | Transmission system of interactive video and audio |
| CN103188473A (en) * | 2011-12-27 | 2013-07-03 | 北京同步科技有限公司 | Video capture card and processing method thereof |
| CN207367592U (en) * | 2017-11-08 | 2018-05-15 | 北京开心练教育科技有限公司 | The midi signal conversion equipment of electronic keyboard |
| CN208479802U (en) * | 2018-05-25 | 2019-02-05 | 广州市昇蓝演艺设备有限公司 | Time code converter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2034485A1 (en) * | 2007-09-07 | 2009-03-11 | Thomson Licensing | System and method for generating linear time code data |
-
2018
- 2018-05-25 CN CN201810517734.5A patent/CN108449561B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5828678A (en) * | 1996-04-12 | 1998-10-27 | Avid Technologies, Inc. | Digital audio resolving apparatus and method |
| US5764965A (en) * | 1996-09-23 | 1998-06-09 | Silicon Graphics, Inc. | Synchronization infrastructure for use in a computer system |
| US5857044A (en) * | 1996-09-23 | 1999-01-05 | Sony Corporation | Method and apparatus for processing time code |
| US6134379A (en) * | 1997-03-20 | 2000-10-17 | Avid Technology, Inc. | Method and apparatus for synchronizing devices in an audio/video system |
| KR20080087267A (en) * | 2007-03-26 | 2008-10-01 | 주식회사 시큐인포 | Transmission system of interactive video and audio |
| CN103188473A (en) * | 2011-12-27 | 2013-07-03 | 北京同步科技有限公司 | Video capture card and processing method thereof |
| CN207367592U (en) * | 2017-11-08 | 2018-05-15 | 北京开心练教育科技有限公司 | The midi signal conversion equipment of electronic keyboard |
| CN208479802U (en) * | 2018-05-25 | 2019-02-05 | 广州市昇蓝演艺设备有限公司 | Time code converter |
Non-Patent Citations (3)
| Title |
|---|
| 6 Gbit/s uncompressed 4K video stream switching on a 10 Gbit/s network;Daisuke Shirai et al.;《2007 International Symposium on Intelligent Signal Processing and Communication》;全文 * |
| DVCAM系列摄像机、编辑录放机时间码的应用;段天学;《西部广播电视》;全文 * |
| 时间码在音视频制作中的应用;王健林;《影视技术》;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108449561A (en) | 2018-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2189948A3 (en) | Diagnostic system having a wake-up circuit | |
| US8239693B2 (en) | Built-in system power management circuit and motherboard with thereof | |
| CN108449561B (en) | Time code converter | |
| CN106878650B (en) | DVI to VGA video conversion device and method thereof | |
| CN203279031U (en) | MHL-HDMI converting and receiving unit and television with same | |
| CN202025058U (en) | Digital display secondary cable core aligner based on wireless technology | |
| CN114071048A (en) | Multi-type video interface conversion device and conversion method | |
| CN208479802U (en) | Time code converter | |
| CN202587239U (en) | Image signal generator capable of realizing multiple video interface expansion functions | |
| CN216391231U (en) | Docking station with double video interfaces | |
| CN212484911U (en) | Novel LED display system | |
| CN101355690B (en) | Additional device and main switching device for remote monitoring system as well as preprocessing method | |
| CN203502955U (en) | Processor system with multichannel data real-time transmitting and processing technology | |
| CN202364224U (en) | Four-core optical fiber HDMI optical transceiver | |
| CN219370342U (en) | Intelligent interaction panel | |
| US20120062200A1 (en) | Voltage regulation device and system employing the same | |
| CN104503727A (en) | Audio processing method and device based on KVM system, and server | |
| CN203104673U (en) | Monitoring device with two power inputs | |
| CN201388251Y (en) | Signal receiver for digital camera | |
| CN101404149B (en) | DVI-I and VGA interface circuit | |
| CN204679558U (en) | A kind of intelligent electric instrument | |
| CN216217283U (en) | Support SFP's 8K high definition video monitoring tester | |
| CN204681491U (en) | Multi-format video and audio converter | |
| CN201270513Y (en) | Bluetooth transmission system used for vehicle data transmission | |
| CN202171624U (en) | A simulation/digital stream signal visualization monitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |